Chevrolet Repair: Chevy Blazer 1989, chevy blazer, gas fires

Question
My son blazer crank (battery in good condition)but wont start...thanks a lot

Answer
Hello Manolo,
First thing to check for is spark, then fuel.
To help much, I also need to know if it has a carburetor, or is fuel injected.
If there is no good spark at the plug wires, then check the ignition fuse, and if power is getting to the coil.
If there is good spark, pour about an ounce of gas in the carb or throttle body, and then crank it, and see if that gas fires.
That will isolate whether it is a spark or fuel problem.
Then go from there.
Van